FIELD: information technology.
SUBSTANCE: invention relates to measurement of the luminous efficacy of the backlight of a display device in order to predict failure of backlight. An early warning system and method for predicting a failure of a backlight of any display that uses internal illumination, such as a liquid crystal display (LCD), digital light processing (DLP), or liquid crystal on silicon (LCoS). This display could be a flat screen type or a projector type. A display indicating that failure is imminent within a certain period of time is provided. A countdown display of life remaining may also be provided. Colour temperature of the backlight is monitored and compared over time to form the prediction of failure. Measurements may also include measurements of individual components of light, such as the red, green, and blue components. Components may be compared individually over time to detect a colour shift that reaches a threshold of prediction failure.
EFFECT: providing more accurate early warning on failure of backlight of a liquid crystal display.
23 cl, 9 dwg
